Antibody:	anti-Beclin1
Detection system:	Secondary antibody coupled to horseradish peroxidase

Structure	Level	Pattern	Image	Note
TS21: lower jaw molar epithelium	Present	Regionally restricted	1a	Expression is the epithelium bud that facing the oral cavity and invades into the tip of the bud.
TS21: lower jaw molar mesenchyme	Present	Regionally restricted	1a	Expression is in the condensed mesenchyme around the epithelial bud.
TS21: oral epithelium	Present		1a

Structure	Level	Pattern	Image	Note
TS22: cap stage tooth	Present	Regionally restricted	1b	Expression is in the inner and outer enamel epithelium.
TS22: lower jaw molar epithelium	Present	Regionally restricted	1b	Expression is in the inner and outer enamel epithelium.
TS22: primary enamel knot	Present		1b
TS22: stellate reticulum	Present		1b

Structure	Level	Pattern	Image	Note
TS22: palatal shelf epithelium	Present	Regionally restricted	1c	Expression is in the non-transitional epithelial island of the medial epithelial seam at the midline.

Structure	Level	Pattern	Image	Note
TS22: Meckel's cartilage	Present		1d

Structure	Cell Type	Level	Pattern	Image	Note
TS24: lower jaw skeleton	osteoblast	Strong	Single cells	1e , 1e'	Expression is in osteoblasts in the alveolar bone.
TS24: early bell stage tooth		Present		1e' , 1e
TS24: inner enamel epithelium		Present		1e' , 1e
TS24: lower jaw molar dental lamina		Present		1e' , 1e
TS24: lower jaw molar enamel organ		Present		1e' , 1e
TS24: mandible		Present		1e' , 1e
TS24: outer enamel epithelium		Present		1e' , 1e
TS24: stellate reticulum		Present		1e' , 1e
TS24: stratum intermedium		Present		1e' , 1e

Structure	Level	Pattern	Image	Note
TS24: nasal cartilage	Present		1f
TS24: nasal cavity mucosa	Present		1f

Structure	Level	Pattern	Image	Note
TS26: inner enamel epithelium	Present		1g' , 1g'' , 1g
TS26: molar dental lamina	Present		1g' , 1g'' , 1g
TS26: outer enamel epithelium	Present		1g' , 1g'' , 1g
TS26: stellate reticulum	Present		1g' , 1g'' , 1g
TS26: stratum intermedium	Present		1g' , 1g'' , 1g

Structure	Cell Type	Level	Pattern	Image	Note
TS27: molar dental pulp	odontoblast	Present	Regionally restricted	2a'' , 2a' , 2a	Expression is in the polarizing and differentiated odontoblasts.
TS27: lower jaw molar enamel organ	ameloblast	Present	Regionally restricted	2a , 2a'' , 2a'	Expression is in differentiating ameloblasts.
TS27: stellate reticulum		Present	Single cells	2a' , 2a , 2a''	There are scattered positive cells in the stellate reticulum.
TS27: outer enamel epithelium		Present		2a , 2a' , 2a''
TS27: stratum intermedium		Present		2a , 2a' , 2a''

Structure	Cell Type	Level	Pattern	Image	Note
TS28: outer enamel epithelium		Present		2b' , 2b'' , 2b
TS28: stellate reticulum		Present		2b' , 2b'' , 2b
TS28: stratum intermedium		Present		2b' , 2b'' , 2b
TS28: lower jaw molar enamel organ	ameloblast	Present		2b' , 2b , 2b''
TS28: molar dental pulp	odontoblast	Present		2b'' , 2b' , 2b

Structure	Level	Pattern	Image	Note
TS24: Meckel's cartilage	Present